Mich. Comp. Laws § 432.33

Sec. 33. (1) Unclaimed prize money for the prize on a winning ticket or share of the state lottery shall be retained by the commissioner for the person entitled to the prize money for 1 year after the drawing in which the prize was won. If a claim is not made for the prize money within the year, the prize money shall be deposited in the state school aid fund and distributed pursuant to law. (2) Unclaimed prize money for the prize on a winning ticket or share of any joint enterprise shall be treated in the manner provided for in the joint enterprise participation agreement executed by the commissioner. To the extent that the state of Michigan is entitled to any unclaimed prize money, that money received shall be deposited into the state school aid fund and distributed pursuant to law.